Cylinder Head Comparison Sheet Big Block Mopar
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- Cynthia Phelps
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1 Cylinder Head Comparison Sheet Big Block Mopar PowerPort Series Cylinder Heads for Big Block Valve Lift PowerPort cc Street 78cc -profiled 2.190" intake; 1.760" exhaust 334 cfm intake; 262 cfm exhaust Ideal for cubic inch street performance engines Street intake and exhaust runners Delivers great torque and throttle response Capable of supporting 650+ horsepower as PowerPort cc 78cc -profiled 2.190" intake; 1.760" exhaust 352 cfm intake; 262 cfm exhaust Ideal for cubic inch performance engines intake and exhaust runners Delivers strong midrange horsepower and torque Capable of supporting 700+ horsepower as
2 Cylinder Head Comparison Sheet GM LS GenX Series Cylinder Heads for GM LS GenX L/5.3L/5.7L (Vortec) 205cc, 58cc profiled 2.000" intake; 1.575" exhaust 284 cfm intake; 228cfm exhaust Ideal for street performance and mild race 4.8L, 5.3L, and 5.7L engines Fully intake and exhaust runners plus -profiled combustion chambers 3.780" minimum bore required 1997-present GM vehicles with 4.8L, 5.3L, 5.7L, and 6.0L engines Capable of supporting up to 600 horsepower as GenX 220 LS1 220cc, 64cc profiled 2.040" intake; 1.575" exhaust 305 cfm intake; 233 cfm exhaust performance and entry level drag racing applications 3.900" minimum bore required 1997-present GM vehicles with 5.7L and 6.0L engines Capable of supporting 550+ horsepower as GenX 220 LS2 220cc, 65cc profiled 2.055" intake; 1.575" exhaust 314 cfm intake; 233 cfm exhaust performance and entry level drag racing applications 4.000" minimum bore required 1997-present GM vehicles with 5.7L and 6.0L engines Capable of supporting up to 600 horsepower as GenX 215 LS1 215cc, 64cc profiled 2.040" intake; 1.575" exhaust 320 cfm intake; 245 cfm exhaust performance and entry level drag racing applications Fully intake and exhaust runners plus -profiled combustion chambers 3.900" minimum bore required 1997-present GM vehicles with 4.8L, 5.3L, 5.7L, and 6.0L engines Capable of supporting 600+ horsepower as GenX 225 LS2 225cc, 65cc profiled 2.055" intake; 1.575" exhaust 338 cfm intake; 245 cfm exhaust performance and entry level drag racing applications Fully intake and exhaust runners plus -profiled combustion chambers 4.000" minimum bore required 1997-present GM vehicles with 4.8L, 5.3L, 5.7L, and 6.0L engines Capable of supporting 650+ horsepower as
3 Cylinder Head Comparison Sheet GM LS GenX Series Cylinder Heads for GM LS (continued) GenX 235 LSX 235cc, 70cc profiled 2.100" intake; 340 cfm intake; 245 cfm exhaust performance, mild race, and bracket racing applications Fully intake and exhaust runners plus -profiled combustion chambers 4.125" minimum bore required 6-bolt mounting pattern for high compression, high boost applications 1997-present GM vehicles with 4.8L, 5.3L, 5.7L, and 6.0L engines Capable of supporting 700+ horsepower as GenX 245 LSX 245cc, 70cc profiled 2.100" intake; 340 cfm intake; 245 cfm exhaust performance, mild race, and bracket racing applications Fully intake and exhaust runners plus -profiled combustion chambers 4.125" minimum bore required 6-bolt mounting pattern for high compression, high boost applications 1997-present GM vehicles with 4.8L, 5.3L, 5.7L, and 6.0L engines Capable of supporting 700+ horsepower as GenX 255 LS3 255cc, Square Port 69cc profiled 2.165" intake; 382 cfm intake; 258 cfm exhaust performance, mild race, and bracket racing applications Fully intake and exhaust runners plus -profiled combustion chambers 4.000" minimum bore required Available with standard and 6-bolt mounting patterns Emissions-legal under CARB E.O. #D for 2007-present GM vehicles with 6.2L engines Capable of supporting 750+ horsepower as GenX 260 LS7 260cc, Square Port 70cc profiled 2.200" intake; 393 cfm intake; 254 cfm exhaust performance, mild race, and bracket racing applications Fully intake and exhaust runners plus -profiled combustion chambers 4.100" minimum bore required Available with standard and 6-bolt mounting patterns 2006-present GM vehicles with 7.0L engines Capable of supporting 750+ horsepower as
4 Cylinder Head Comparison Sheet GM LT1 GenX Series Cylinder Heads for GM LT1 GenX cc 54cc -profiled 260 cfm intake; 206 cfm exhaust Ideal for stock bore, naturally aspirated LT1 engines 21 degree valve angles Capable of delivering in excess of 500 horsepower as GenX cc 62cc standard 254 cfm intake; 190 cfm exhaust Ideal for engines with forced induction and 383 c.i.d. and larger maximum performance stroker engines 23 degree valve angles Capable of delivering in excess of 500 horsepower as
5 Cylinder Head Comparison Sheet Small Block Chevrolet Super 23 and Ultra 18 Series Cylinder Heads for Small Block Chevrolet (unless otherwise specified) Super cc 56cc standard 1.940" intake; 1.500" exhaust 245 cfm intake; 192 cfm exhaust Ideal for cubic inch engines Delivers great torque and throttle response Accepts most factory accessories Emissions-legal under CARB E.O. #D for 1995-earlier GM vehicles with Chevy engines Capable of supporting up to 450 horsepower as Super with standard cast combustion chambers 195cc 62cc standard 254 cfm intake; 190 cfm exhaust Ideal for cubic inch street performance engines Delivers strong midrange horsepower and torque Accepts most factory accessories Emissions-legal under CARB E.O. #D for 1995-earlier GM vehicles with Chevy engines Capable of supporting up to 500 horsepower as Super with -profiled combustion chambers 195cc 64cc or 72cc profiled Intake: 64cc / 258 cfm 72cc / 249 cfm Exhaust: 64cc / 196 cfm 72cc / 199 cfm Same as other Super but with choice of 64cc or 72cc profiled combustion chambers Emissions-legal under CARB E.O. #D for 1995-earlier GM vehicles with Chevy engines Super cc 67cc or 72cc standard 287 cfm intake; 223 cfm exhaust (@.700" valve lift) Ideal for 350 cubic inch and larger hot street, bracket race, and modified oval track engines Delivers strong upper RPM horsepower and torque Capable of supporting up to 650 horsepower as Super cc Street or 70cc profiled 310 cfm intake; 240 cfm exhaust (@.700" valve lift) Ideal for maximum performance 383 cubic inch and larger engines Fully Street or intake and exhaust runners options plus -profiled combustion chambers Delivers 700+ horsepower as in excess of 7,000+ RPM Ultra cc 56cc -profiled 2.150" intake; 343 cfm intake; 269 cfm exhaust (@.700" valve lift) Ideal for maximum effort 358 cubic inch and larger engines in bracket racing and oval track cars Fully intake and exhaust runners Fully -profiled combustion chambers Capable of supporting 700+ horsepower as
6 Cylinder Head Comparison Sheet Big Block Chevrolet PowerOval and PowerPort Series Cylinder Heads for Big Block Valve Lift PowerOval cc 113cc -profiled 2.190" intake; 1.880" exhaust 347 cfm intake; 264 cfm exhaust Ideal for street performance, RV/towing, mild race, and bracket racing applications that operate up to 7,000 RPM Delivers tremendous midrange torque for excellent performance in heavy vehicles Capable of supporting 700+ horsepower as PowerPort cc 122cc -profiled 2.250" or 2.300" intake; 1.880" exhaust 362 cfm intake; 301 cfm exhaust Perfect for street performance and bracket racing applications Engines under 500 cubic inches require a loose torque converter Capable of 750 horsepower as PowerPort cc 119cc -profiled 2.350" intake; 1.880" exhaust 424 cfm intake; 337 cfm exhaust Best for use with large cubic inch naturally aspirated stroker combinations, forced induction, or engines running on alcohol Ideal for 500+ cubic inch engines using stock intake port location Fully intake and exhaust runners Requires a loose torque converter or a manual transmission Capable of 1,000+ horsepower as in excess of 7,500 RPM
7 Cylinder Head Comparison Sheet Ford 4.6L/5.4L 2V Series Cylinder Heads for Ford 4.6L/5.4L 2V cc 38cc or 44cc -profiled 1.840" intake; 1.450" exhaust 252 cfm intake; 188 cfm exhaust Perfect for street performance and mild race applications OE PI-style intake inlets; Fast As Cast intake and exhaust runners Full 3/4 reach spark plugs; replaceable cam bearing journals Accepts all OE-type 2V cams, followers, lash adjusters, and valve covers Accepts all Romeo and Windsor valve covers plus most OE Ford front covers Capable of 450+ horsepower as Track Heat cc 38cc or 44cc -profiled 1.840" intake; 1.450" exhaust 252 cfm intake; 188 cfm exhaust Same features as 185 cylinder heads but with 275 lbs. per inch rate valve springs for engines with power adders and/or high-rpm applications Capable of 500+ horsepower as Race cc 44cc profiled 1.840" intake; 1.450" exhaust 278 cfm intake; 199 cfm exhaust Same features as Track Heat 185 heads but fully Perfect for large cubic inch, forced induction, and high RPM engines Capable of 550+ horsepower as
8 Cylinder Head Comparison Sheet Ford 351C, 351M/400, and 351 Clevor PowerPort Cleveland Series Cylinder Heads for Ford 351C, 351M/400, and Clevor Conversions PowerPort Cleveland cc Street 62cc or 72cc -profiled 313 cfm intake; 236 cfm exhaust Perfect for street performance and mild racing applications Combines factory 351C 2V low- and midrange muscle with 351C 4V high-rpm ability and top-end might With minor machining, these heads can also be used on 302/351W blocks Capable of horsepower as PowerPort Cleveland cc 60cc or 72cc -profiled 339 cfm intake; 244 cfm exhaust Ideal for maximum performance engines Combines factory 351C 2V low- and midrange muscle with 351C 4V high-rpm ability and top-end might Fully runners 10 titanium retainers With minor machining, these heads can also be used on 302/351W blocks Capable of up to 700 horsepower as
9 Cylinder Head Comparison Sheet Small Block Ford and High Port Series Cylinder Heads for Small Block Ford (unless otherwise specified) cc 58cc or 61cc -profiled 257 cfm intake; 193 cfm exhaust Ideal for street performance and mild bracket racing applications Delivers great torque and throttle response Some heads emissions-legal under CARB E.O. #D for 1996-earlier Ford 289, 302, and 351W engines Capable of 500+ horsepower as 11R cc Street 53cc or 63cc profiled 277 cfm intake; 216 cfm exhaust Ideal for street performance and mild bracket racing applications Street intake and exhaust runners Features 11 Intake and 13 exhaust valve angles Capable of supporting 550 horsepower as 11R cc Street or 56cc or 66cc profiled 2.055" intake; Street : 304 cfm intake; 227 cfm exhaust : 311 cfm intake; 277 cfm exhaust Ideal for maximum performance street and competition level bracket racing applications Restructured combustion chamber arrangement for more airflow Your choice of Street or runners 11 intake and 13 exhaust valve angles Capable of supporting 700 horsepower as 11R cc 56cc or 66cc profiled 321 cfm intake; 227 cfm exhaust Ideal for maximum performance street and competition level bracket racing applications Restructured combustion chamber arrangement for more airflow Your choice of Street or runners 11 intake and 13 exhaust valve angles Capable of supporting 700 horsepower as Race cc 61cc profiled 305 cfm intake; 235 cfm exhaust (@.700" valve lift) Ideal for maximum effort street performance and bracket racing cars Copper bronze exhaust seats combat extreme combustion chamber temperatures in high boost forced induction engines Small cubic inch engines require a loose torque converter Capable of 650 horsepower as Race cc 65cc profiled 341 cfm intake; 271 cfm exhaust (@.700" valve lift) Fully version of the Twisted Wedge Race 206 cylinder heads Ideal for maximum effort street performance and drag racing cars Copper bronze exhaust seats combat extreme combustion chamber temperatures in high boost forced induction engines Requires high-flowing intake and exhaust systems; small cubic inch naturally aspirated engines require a loose torque converter Capable of 700+ horsepower and 7,500 RPM as
10 Cylinder Head Comparison Sheet Small Block Ford and High Port Series Cylinder Heads for Small Block Ford (continued) (unless otherwise specified) High Port cc 64cc -profiled 283 cfm intake; 193 cfm exhaust Ideal for street performance and drag racing applications on both naturally aspirated and forced induction engines One of the most dominant Ford race cylinder heads available Capable of supporting 550 horsepower as High Port cc 58cc or 70cc profiled Intake: 58cc / 333 cfm 70cc / 335 cfm Exhaust: 58cc / 255 cfm 70cc / 257 cfm Fully -ported version of the High Port 192 cylinder heads with additional valve spring package options Ideal for maximum effort street performance and bracket racing cars Requires high-flowing intake and exhaust systems; small cubic inch naturally aspirated engines require a loose torque converter Capable of 700 plus horsepower and 7,500 RPM as High Port cc 67cc or 76cc profiled 2.100" intake 343 cfm intake 257 cfm exhaust Fully -ported version of the High Port 192 cylinder heads with additional valve spring package options Ideal for maximum effort street performance and bracket racing cars Requires high-flowing intake and exhaust systems; small cubic inch naturally aspirated engines require a loose torque converter Capable of 700 plus horsepower and 7,500 rpm as
11 Cylinder Head Comparison Sheet Ford 429/460 PowerPort Series Cylinder Heads for Ford Valve Lift (unless otherwise specified) PowerPort cc 74cc standard 2.200" intake; 1.760" exhaust 350 cfm intake; 240 cfm exhaust Awesome OEM replacement cylinder heads ideal for street performance, RV/towing, and mild racing applications Capable of supporting up to 700 horsepower as PowerPort cc 78cc -profiled 2.250" intake; 1.760" exhaust 401 cfm intake; 287 cfm exhaust Fully version of the PowerPort 290 cylinder heads Perfect for street performance and mild bracket racing applications Capable of supporting in excess of 850+ horsepower as PowerPort A cc 83cc or 87cc -profiled M83 standard intake: 2.300" M83/M87 18-bolt intake: 2.350"; 1.880" exhaust 428 cfm intake; 303 cfm exhaust Valve Lift with 2.350" intake valves) Ideal for maximum performance street, bracket racing, truck pull, and monster truck applications Small cubic inch engines require a loose torque converter Available with standard and 18-bolt mounting patterns Capable of supporting in excess of 850 horsepower as on naturally aspirated engines PowerPort A cc 85cc or 87cc -profiled 2.400" intake; 1.880" exhaust 453 cfm intake; 321 cfm exhaust (@.800" valve lift) Fully version of the PowerPort A cylinder heads 18-bolt mounting pattern Capable of supporting in excess of 1,000+ horsepower as on naturally aspirated and forced induction engines
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